Powder charging hole sealing method applied to top plate deep hole pre-splitting blasting

Abstract

The invention discloses a powder charging hole sealing method applied to top plate deep hole pre-splitting blasting. A rubber hole sealing device, an anchoring rod anchoring agent, cartridge groups, cartridges, a push rod and a detonator are included, a secondary detonating cord and a plastic wire rope are installed at the rear end of the dynamite in the last piece of the cartridge in each group of the cartridge group, the plastic wire rope transversely penetrates through a cartridge tube, all secondary detonating cords are in parallel connection with a primary detonating cord, the front and rear ends of the primary detonating cord are fastened to the first piece of the cartridge and the last piece of the cartridge of the last piece of the cartridge groups respectively, an electric detonator is installed in the rear end of the dynamite in the last piece of the cartridge in the last cartridge group, a leading wire is connected with the electric detonator, and the electric detonator sequentially penetrates through the anchoring rod anchoring agent and a capsule hole sealing device and is led out of a detonating hole and connected with the detonator. The method has the advantages thatmaterials used in powder filling and hole sealing are less, consumed time is less, the number of used workers is less, the capsule hole sealing device can be recovered after releasing pressure afterdetonation, the cost is low, simultaneous bomb pulling and hole penetrating are prevented, and the hole sealing effect is good.

Description

technical field [0001] The invention relates to the technical field of roof deep hole pre-splitting blasting hole sealing, in particular to a charge sealing method for roof deep hole pre-splitting blasting. Background technique [0002] As my country's coal mines have been transferred to deep mining, the complexity of the deep mechanical environment and the changes in the mechanical properties of coal and rock have significantly increased the intensity and frequency of coal mine roof dynamic disasters. According to relevant statistics, among all kinds of accidents in coal mines, the number of roof accidents and the death toll account for a relatively large proportion, which is the key prevention and control object in coal mine accidents. [0003] With the increase of coal mine mining intensity and the increase of the scope of underground stope, if the hard roof above the coal seam cannot collapse in time with the advancement of the working face, the hard roof will bend and s...

AI Technical Summary

Problems solved by technology

However, in this hole sealing method, all the holes are sealed with plugging materials. For example, if the plugging material is bolt anchoring agent, 6 boxes of bolt anchoring agent (25kg / box), 5 workers, takes about 80 minutes, low labor efficiency and high cost

In addition, some sandstone roof holes have water spraying on the roof, which leads to water in the blast hole. The traditional hole sealing method that uses all plugging materials to seal the hole is likely to cause the hole to be pulled out. In the blockage area, the surrounding rock is blasted to crush and burst the surrounding rock, but the blocking material is broken through and penetrated from the blast hole to the outside of the hole, and the hole sealing effect is not good.

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